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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018, 2019, 2020 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2020, 2021 Simon Tournier <zimon.toutoune@gmail.com>
;;; Copyright © 2020 Konrad Hinsen <konrad.hinsen@fastmail.net>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (guix scripts repl)
#:use-module (guix ui)
#:use-module (guix scripts)
#:use-module (guix repl)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-37)
#:use-module (ice-9 match)
#:use-module (rnrs bytevectors)
#:autoload (guix describe) (current-profile)
#:autoload (system repl repl) (start-repl)
#:autoload (system repl server)
(make-tcp-server-socket make-unix-domain-server-socket)
#:export (guix-repl))
;;; Commentary:
;;;
;;; This command provides a Guile script runner and REPL in an environment
;;; that contains all the modules comprising Guix.
(define %default-options
`((type . guile)))
(define %options
(list (option '(#\h "help") #f #f
(lambda args
(show-help)
(exit 0)))
(option '(#\V "version") #f #f
(lambda args
(show-version-and-exit "guix repl")))
(option '(#\t "type") #t #f
(lambda (opt name arg result)
(alist-cons 'type (string->symbol arg) result)))
(option '("listen") #t #f
(lambda (opt name arg result)
(alist-cons 'listen arg result)))
(option '(#\q) #f #f
(lambda (opt name arg result)
(alist-cons 'ignore-dot-guile? #t result)))
(option '(#\L "load-path") #t #f
(lambda (opt name arg result)
;; XXX: Imperatively modify the search paths.
(set! %load-path (cons arg %load-path))
(set! %load-compiled-path (cons arg %load-compiled-path))
result))))
(define (show-help)
(display (G_ "Usage: guix repl [OPTIONS...] [-- FILE ARGS...]
In the Guix execution environment, run FILE as a Guile script with
command-line arguments ARGS. If no FILE is given, start a Guile REPL.\n"))
(display (G_ "
-t, --type=TYPE start a REPL of the given TYPE"))
(display (G_ "
--listen=ENDPOINT listen to ENDPOINT instead of standard input"))
(display (G_ "
-q inhibit loading of ~/.guile"))
(newline)
(display (G_ "
-L, --load-path=DIR prepend DIR to the package module search path"))
(newline)
(display (G_ "
-h, --help display this help and exit"))
(display (G_ "
-V, --version display version information and exit"))
(newline)
(show-bug-report-information))
(define user-module
;; Module where we execute user code.
(let ((module (resolve-module '(guix-user) #f #f #:ensure #t)))
(beautify-user-module! module)
module))
(define (call-with-connection spec thunk)
"Dynamically-bind the current input and output ports according to SPEC and
call THUNK."
(if (not spec)
(thunk)
;; Note: the "PROTO:" prefix in SPEC is here so that we can eventually
;; parse things like "fd:123" in a non-ambiguous way.
(match (string-index spec #\:)
(#f
(leave (G_ "~A: invalid listen specification~%") spec))
(index
(let ((protocol (string-take spec index))
(address (string-drop spec (+ index 1))))
(define socket
(match protocol
("tcp"
(make-tcp-server-socket #:port (string->number address)))
("unix"
(make-unix-domain-server-socket #:path address))
(_
(leave (G_ "~A: unsupported protocol family~%")
protocol))))
(listen socket 10)
(let loop ()
(match (accept socket)
((connection . address)
(if (= AF_UNIX (sockaddr:fam address))
(info (G_ "accepted connection~%"))
(info (G_ "accepted connection from ~a~%")
(inet-ntop (sockaddr:fam address)
(sockaddr:addr address))))
(dynamic-wind
(const #t)
(lambda ()
(parameterize ((current-input-port connection)
(current-output-port connection))
(thunk)))
(lambda ()
(false-if-exception (close-port connection))
(info (G_ "connection closed~%"))))))
(loop)))))))
(define-command (guix-repl . args)
(category plumbing)
(synopsis "read-eval-print loop (REPL) for interactive programming")
(define opts
(parse-command-line args %options (list %default-options)
#:build-options? #f
#:argument-handler
(lambda (arg result)
(append `((script . ,arg)
(ignore-dot-guile? . #t))
result))))
(define user-config
(and=> (getenv "HOME")
(lambda (home)
(string-append home "/.guile"))))
(define (set-user-module)
(set-current-module user-module)
(when (and (not (assoc-ref opts 'ignore-dot-guile?))
user-config
(file-exists? user-config))
(load user-config)))
(define script
(reverse
(filter-map (match-lambda
(('script . script) script)
(_ #f))
opts)))
(with-error-handling
(unless (null? script)
;; Run script
(save-module-excursion
(lambda ()
;; Invoke 'current-profile' so that it memoizes the correct value
;; based on (program-arguments), before we call
;; 'set-program-arguments'. This in turn ensures that
;; (%package-module-path) will contain entries for the channels
;; available in the current profile.
(current-profile)
(set-program-arguments script)
(set-user-module)
;; When passed a relative file name, 'load-in-vicinity' searches the
;; file in %LOAD-PATH. Thus, pass (getcwd) instead of ".".
(load-in-vicinity (getcwd) (car script)))))
(when (null? script)
;; Start REPL
(let ((type (assoc-ref opts 'type)))
(call-with-connection (assoc-ref opts 'listen)
(lambda ()
(case type
((guile)
(save-module-excursion
(lambda ()
(set-user-module)
;; Do not exit repl on SIGINT.
((@@ (ice-9 top-repl) call-with-sigint)
(lambda ()
(start-repl))))))
((machine)
(machine-repl))
(else
(leave (G_ "~a: unknown type of REPL~%") type)))))))))
;; Local Variables:
;; eval: (put 'call-with-connection 'scheme-indent-function 1)
;; End:
|
